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Showing United only (incl. its regional partners)All airlines ×
1,456 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

No clear winner: United’s IAD → PIT flights land within a few points of 86% on time whatever the hour.

Best time to leave 8–9 am 90% arrive on time from IAD
Best single flight UA 3540 IAD 22:30 → PIT 23:36 · 80% on time

Time of day × airport

Share of this route’s flights leaving within 15 minutes, by airport and scheduled departure hour, over Aug 2025 – Jul 2026. Blank: no flights then (or fewer than 40 in the year).

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IAD
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% of this route’s flights leaving within 15 min (small number: flights in the Jun 6 – Jul 31, 2026 schedule): 85+75–8465–7455–64under 55

Pick an hour to see this route’s flights leaving then.

Flights, best and worst

Flights in the Jun 6 – Jul 31, 2026 schedule that ran 150+ times in the year. Times are local. Pick a flight for its history.
UA 3540flown by Republic IAD 22:30 PIT 23:36 80%

All 4 United flights in the current schedule

Every flight that flew in the Jun 6 – Jul 31, 2026 schedule, with its record over Aug 2025 – Jul 2026. Times are local. Click a column to sort.
UA 6119flown by Mesa IAD 08:30 PIT 09:40 1h 10m 81 88% 0.0% 86 min
UA 2066 IAD 12:56 PIT 14:03 1h 07m 78 90% 1.3% 107 min
UA 3579flown by Republic IAD 17:30 PIT 18:40 1h 10m 71 73% 5.6% 79 min
UA 3540flown by Republic IAD 22:30 PIT 23:36 1h 06m 334 80% 1.5% 69 min

Nonstops by airline and airport

Arriving within 15 minutes, Aug 2025 – Jul 2026. Pick a row to see that airline’s flights on that airport pair.
United IAD PIT 1h 07m 86% 1.4% 1,456 Flying now
Flying on a particular day? Pick a date above and the same ranking uses our forecast odds for each flight that day: Tomorrow.

About this data: US DOT on-time records, Aug 2025 – Jul 2026, all US airlines; regional flights count under the airline that sells them. Schedules (which flights and connections exist, and their times) are as of Jun 6 – Jul 31, 2026; seasonal flights outside that window aren’t ranked. Rebuilt monthly. JSON